基于Workbench的水下探测舱体O形圈密封性能分析OA

Optical instruments play a significant role in the exploration and research of underwater organisms and energy,generally,optical instruments are built in the probe cabin,the sealing characteristics of the cabin has a significant impact on the service life and application effect of optical instruments,therefore,it is necessary to analyze the sealing characteristics of the cabin.A two-dimensional axis-symmetric model of the sealing area of the underwater probe cabin is established on ANSYS workbench platform.The Mooney-Rivlin two-parameter model is used to simulate the assembly process of nitrile O-rings,and those O-rings not prone to large shear deformation during assembly process are chosen to perform sealing characteristics simulation in 200 m water depth.By comparative analysis of contact pressure,shear force and compression ratio of O-rings,it is found in the medium pressure of 2 MPa,the values of 2.8 mm and 3.0 mm wire diameter O-rings are basically similar in the calculation results.Considering the influence of precompression rate on assembly,the O-ring with 2.8 mm wire diameter is selected as the model used for the probe cabin.The analysis provides theoretical basis for the design of cabin seal,and hydrostatic pressure test of the cabin sealing performance verifies that the underwater probe cabin meets the requirements of sealing.